Questions and Answers
What is a tissue?
A group of cells similar to one another in structure that perform a common or related function.
Which type of tissue lines body cavities and covers the body's external surface?
Epithelium.
What is the primary function of muscle tissue?
Pumps blood, flushes urine out of the body, allows one to swing a bat.
What type of tissue transmits electrochemical impulses?
Signup and view all the answers
What is the primary role of connective tissue?
Signup and view all the answers
What are five general characteristics of epithelial tissue?
Signup and view all the answers
On what basis are epithelial tissues classified?
Signup and view all the answers
What are five functions of epithelium?
Signup and view all the answers
How does the function of stratified epithelium differ from that of simple epithelium?
Signup and view all the answers
Where is ciliated epithelium found?
Signup and view all the answers
What role does ciliated epithelium play in the respiratory and reproductive tracts?
Signup and view all the answers
How does transitional epithelium differ structurally from other stratified squamous epithelium?
Signup and view all the answers
How do endocrine and exocrine glands differ in structure and function?
Signup and view all the answers
What tissue lines the esophagus?
Signup and view all the answers
What tissue lines the stomach?
Signup and view all the answers
Which tissue is found in the alveolar sacs of the lungs?
Signup and view all the answers
What type of tissue forms the dermis of the skin?
Signup and view all the answers
What are the main functions performed by connective tissue?
Signup and view all the answers
What is the tissue of the heart?
Signup and view all the answers
What are two physiological characteristics highly developed in neurons?
Signup and view all the answers
How do skeletal and smooth muscle differ in terms of control?
Signup and view all the answers
What structural feature is unique to cardiac muscle cells?
Signup and view all the answers
Study Notes
Tissue Definitions and Functions
- Tissue is a group of similar cells that perform a common function.
- Epithelium lines body cavities and covers the body's external surface, involved in absorption, secretion, and filtration.
- Muscle tissue is responsible for pumping blood, flushing urine, and facilitating movements like swinging a bat.
- Nervous tissue transmits electrochemical impulses, crucial for communication in the body.
- Connective tissue anchors, packages, and supports body organs; it has an abundant extracellular matrix.
Characteristics of Tissue Types
-
Epithelial Tissue:
- Features include closely packed cells with minimal intercellular material, avascular nature, free edges, and high regenerative capacity.
- Classified by the number of layers (simple vs. stratified) and cell shapes (squamous, cuboidal, columnar).
-
Connective Tissue:
- Characteristics include a common origin from mesenchyme, varying vascularity, and large amounts of extracellular matrix.
- Functions include protection, support, binding other tissues, and transportation of substances.
Specific Epithelial Types and Locations
- Stratified squamous epithelium lines the esophagus and provides protection.
- Simple columnar epithelium lines the stomach, aiding in absorption and secretion.
- Simple squamous epithelium forms the alveolar sacs of lungs and lines serous membranes.
- Transitional epithelium lines the bladder, capable of stretching and maintaining its structure.
Glandular Epithelium
- Endocrine glands are ductless, release hormones directly into the bloodstream.
- Exocrine glands maintain ducts and secrete substances to body surfaces.
Muscle Tissue Characteristics
- Skeletal muscle is voluntarily controlled, striated, and has multiple nuclei; it facilitates locomotion.
- Cardiac muscle is involuntarily controlled, striated, contains intercalated discs, and has a single nucleus per cell; it constitutes the heart.
- Smooth muscle is involuntarily controlled, non-striated, contains spindle-shaped cells, and lines hollow organs.
Nervous Tissue Structure and Function
- Neurons exhibit high irritability and conductivity, facilitating impulse transmission.
- Neurons have a unique structure with elongated processes, enabling long-distance communication in the body.
Specialized Connective Tissues
- Adipose connective tissue stores fat and insulates against heat loss; its cells appear like a "signet ring."
- Dense fibrous connective tissue connects muscles to bones and bones to one another, providing strength.
- Hyaline cartilage gives structure to the embryonic skeleton, respiratory passages, and rib cartilages.
- Osseous tissue provides hard structure to bones and serves as levers for muscle action.
- Elastic cartilage offers flexibility in structures like the external ear.
Summary of Muscle Control
- Skeletal muscle allows voluntary movements and is attached to bones.
- Cardiac and smooth muscles operate involuntarily and change the volume of organs as they contract.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the classification of tissues with these review flashcards. Each card provides a definition and key terms related to various types of tissues, including epithelium and muscle. Perfect for students looking to solidify their understanding of tissue structure and function.
